Handle for pneumatic hammers.



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UNITED STATES PATENT FFI. CHARLES T. @ARNm-IAN, or DENVER, ooLonADo.HANDLE FOR PNEUMATIC HAMMERS No. 839,727. Specification of LettersPatent. Patented Dec. 25, 1906.

' Application filed July S1, 1906. Serial No. 328,583.

To all whom it may concern,.-

Be it known that I, CHARLES T. CARNAHAN, a citizen of the United States,residing at. enver, in the county ofDenver and State of Colorado, haveinvented new and useful Improvements in Handles for Pneumatic Hammers,of which the following is a speciiication.

This invention relates to handles for pneulo matic ammers, and aims toprovide a hancharacters, l denotes the c linder of the pneumatic hammerand whic has mounted 55 upon one end thereof acap 2, the latter beingprovided with screw-threads ada ted to engage with screw-threads formed)upon the periphery of the cylinder. Centrally ot the upper face of thecap 2 a protuberance 3 is 6o provided which is exteriorlyscrew-threaded, and engaging the exterior screw-threads of which willenable the 'rotatin or turning of A. f the cylinder of thefhammer inependently of ff the handle, and which will also permit of the I5 handleand cylinder being rotated or turned if'. in unison.

' Primarily the invention aims to improve the construction of{Sineumatic hammer set forth in application, erial N o. 280,194, filed 120 September 26, 1905 and to this end the invention consists inproviding a hammer with when the latter 1s in operative position and',`

- a buifer for relieving the operator to a conthermore, to allow of thegrip swiveling 7 5 'fa l siderable extent of the jar and vibration uponsaid sleeve. When the ip 6 is in powhen the hammer is operated. sition,so that the collar 7 wil surroundfthe The invention further aims toprovide a sleeve 4, the'flange 5 connects the grip to the hammer forpneumatic drills in a manner as cap 2. Surrcundinv the sleeve 4 andarhereinafter set forth which shall be simple in ranged below the collar7 is a washer 8, and 8o its construction, readily connected to the interosed between the washerS and 'then w lcylinder ofthe hammer, strong,durable, efer ace of the cap 2 and surrounding-"t e 30 ,icient in itsuse, comparatively inexpensive ower portion of the sleeve 4 is aresilient an'- to manufacture, and embodyin means to nular member 9,constituting a buffer or top with alaterally-extending annular lian e6'5 5. The retaining-sleeve 4 whensecured 1n clamping position has itsrlower edge resting' upon the upper face of the ca 2.

The reference character 6 denotes agrip, formed of a U-shaped barofsuitable masyo terial, terminating in a co'llar?, the inner diameterthereof being such as to enable the said collar to surround theretaminglsleeve 4 overcome the jar of the piston of t 1e hammer.cushioning means to relieve the Jar upon the 85 With the foregoing andother objects in operator when using the hammer.'- view 'theinventionconsists of the novel con- The grip is coupled to the cap, sothat the' I" n structin, combination, and arran ement of grip cannot berotated independently of the parts hereinafter morespecificallydescribed, cap throu h the medium of a connecting-leand illustrated inthe accompanyin drawver 10, which is pivoted between a pair of 9o ings,which form a part of this speci cation, ears 11, projecting laterallyfrom the cap -2 and wherein is shown the preferred embodiand has bearinagainst its-lower end the ment of the invention; but it is to be underuperfree end oaleaf-sprin 12. This spring v stood that changes,variations, and modiiis edly connected at its Fewer end 'to the cationscan be resorted to which come within cap 2. The connecting -lever 10,when 95 the sco e of the claims hereunto appended. moved to couplingposition so as to couple. In t e drawings, wherein like reference thegrip to the cap 2, is ositioned betweena characters denote correspondingparts pair of laterally-exten lng lugs 13,A formed throughout theseveral views, Fi re 1 is a l integral with thecollar 7. Byprovidingtheview, partly in vertical section, o a handle connecting-lever 10 ina-manner-as stated Qitfroc 1n accordance with this lnvention, alsoshowis evident that when it is positioned betweening a portion ofthevcylinder of the hammer. the lugs 13 the grip will be connected totheSo Fig 2 is a side'elevation; and Fig. 3 is a top cap, so that the gripcannot-'be rotated indel plan, a portion of the grip being shown inpendently of the cap; but when the leveril dotted lines. v'

Referring to the drawings by reference i the grip will rotate in unisonwith the-calpe? 1s moved to a position between-the lugsI-Bz-iog" Thefunction of the spring 12 is to retain the connecting-lever 10 in itslowered or inoperative position.

From the fore oiii'g description, taken iii connection with t ieaccompanying drawings, it is evident that a handle for a pneumatichammer is set up which will permit of the handle being rotatedcontinuously and independently of the cylinder of the hammer, which willalso enable the rotating of the handle and cylinder ofthe hammercontinuously in unison, will providefa cushioning or butler means torelieve the jar upon the operator, owing to the reciprocation of thepiston of the hammer and which, furthermore, will enable the grippingelement of the handle to be readifl connected and disconnected from thecylindjer or the cylinder-ca Although the cylinder is shown as provi edwith 'al cap for oneend thereof, said cap having a protuberance, yet theprotuberance can be formed integral with the cylinder, as will beevident.

Durin the operation of drilling it is essential t at the tool beVrotated or turned.

his is usually accomplished in portable pneumatic hammers by theoperator rotatmgzor turning theentire device from the handle endthereof; but by the application of the'means hereinbefore referred ltoit is not necessary for the operator to utilize more than one hand whenrotating the tool. The other'hand would ress the handle and remainstationary. lhis is not'the case when operatin pneumatic hammers now` ingeneral use, for tereason' thatthe left han'd (oron'e hand) has to rturnwith the device when the device is'being turned 'back'and forth by theright hand (orr'the other hand but it will be evident that-bytheapplica-tion of the means hereinbefore set forth it is not necessary toutilize-more than one 4hand when the device is rotated,-that hand beingthe hand which ips the air-supply pipe or the cylinder, and lirthermore,b providing: the pneumatic hammerwith-tlre means as hereinbefore setforth theoperator can press his body against the handle of the devicenduring the rotation thereof, 'thereby retainin the device inoperaftiveposition-and'at t ie same time ermitting of'tlic operatorshands being ee.

he operator then,l when occasion so requires, can 1 turn the cylinder'of the hammer' independently of the handle at the same time that theoperatorls body is pressed against the handle which 4retains the' devicein yoperativeposition during tlie act of rotating or turningthecylinder. Furthermore, the interposl'tion of the resilient or cushioningmeans between theI collarof the grip 'and the top of the 'cylinder orcap prevents the operaftor4 from 'feeli the jar or vibration-due to theoperation-o the hammer toany great extent.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In a meumatic hammer, the combination with t c cylinder thereofhaving an exteriorly screw threaded protuberance extendingfrom one endthereof, a grip terininating in a collar, and a sleeve engaging thescrew-threads of the protuberance and provided with a flange engagingthe collar for swivelly connecting the grip upon: one end of thecylinder to enable the grip to be1rotated independently of thecylinder.'

In a pneumatic hammer, the combination with the cylinder thereof havingan exteriorly screwthreaded protub'eran'ce` ex tending from one endthereof, a grip terminatiiigin a collar, a sleeve engaginthescrewthreads of the protuberance an' provided with a flange engagingthe collar for iswivell connecting thegrip upon one end fo=the cy inderto enable the gri to.be rotatedlinde pendently of the cylinder, and acushioning means interposed between the collar vand Vthat endof thecylinder from which the protuH berance extends.

3. In la pneumatic hammer, 4the combination with the cylinderthereofliavingfan ex#- teriorly screw threadedprotuberancecxtendin'gfrom' one end thereof, a grip term-i nating in acollar, a' sleeveengag'ing thescrew threads vof the protuberance andprovided with ya flange engaging-the collarfor swivell' connecting thegrip upon one end :of-thee l5i inder to enable the grip to be rortatedilependent of the cylinder, a cushioning means interposed between thecollarand 'th'at en'dcf the cylinder from which th'e.protu1beranoeextends, and Vmeans carried bythe cylinder for coupling the griptherewith fso asto compel the rotating of the cylinder and the grip inunison.

4. In a neumatic hammer, the combination with the cylinder thereof, of agrip swivelly connected upon one 'end of the cylinder therebypermitting-ofthe cylinder rotating independently of the gri V acushioning means interposed between the grip andfthfe cylinder, .andrmeans carried by the cylinder for coupling the grip therewith =so as tocompel the rotating of the cylinderrand 4the grip in unison.

5. In Aa=pneumatic hammer, the combination with the cylinder and a gripthereof, of means for connecting thev rip yto one-end of the cylinder toermit-of ecylinder being rotated indepen entl of the grip, a cushioningmeans interpose 1betvveenfthe gripand the cylinder, and :meansfforcoupling. the-grip with vthe cylinder to compelthe' cylinder and grip toIbe rotated in unison.

6. In a pneumatic hammer, the 'combinar` tion With a closure-cap foroneendof tlieUyl- IOO index' and a protuberance carried by seid cap, i Intestimony whereof I have hereunto set a grip, means engaging theprotuberence for my hend in presence of two subscribing witswlvellyconnecting the grip u on the cap, e 5 messes.

cushionin Ineens interpose between the CHARLES T. CARNAHAN. 5 grip and te cap, and means for coupling the Witnesses:

grip to the cap to prevent rotary movement H. S. PHILLIPS,

of the grip upon the cap. LATIMER FOPLESS,

